LED lamp



FIG. 1 is a perspective view of the ornamental design for a LED lamp;

FIG. 2 is a side elevational view thereof, the other sides being similar;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof.

The broken lines illustrating portions of the LED lamp show environmental features only, and form no part of the claimed design. 

CLAIM The ornamental design for an LED lamp, as shown and described. 